제출 #529430

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
529430		jiahng	Autobahn (COI21_autobahn)	C++14	100 / 100	742 ms	64452 KiB

autobahn

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define int ll
typedef pair<int,int> pi;
typedef vector <ll> vi;
typedef vector <pi> vpi;
typedef pair<pi, ll> pii;
typedef set <ll> si;
typedef long double ld;
#define f first
#define s second
#define mp make_pair
#define FOR(i,s,e) for(int i=s;i<=int(e);++i)
#define DEC(i,s,e) for(int i=s;i>=int(e);--i)
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define lbd(x, y) lower_bound(all(x), y)
#define ubd(x, y) upper_bound(all(x), y)
#define aFOR(i,x) for (auto i: x)
#define mem(x,i) memset(x,i,sizeof x)
#define fast ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0)
#define MOD 1000000007
#define maxn 2000010
//~ #define getchar_unlocked _getchar_nolock

int N,K,X,l,r,t;

inline int readInt() {
    int x = 0;
    char ch = getchar_unlocked();
    while (ch < '0' || ch > '9') ch = getchar_unlocked();
    while (ch >= '0' && ch <= '9'){
		x = (x << 3) + (x << 1) + ch - '0';
		ch = getchar_unlocked();
	}
    return x;
}

struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};

int32_t main() {
    fast;
    N = readInt(); K = readInt(); X = readInt();
	vpi v; vi vect;
    FOR(i,1,N){
		l = readInt(); t = readInt(); r = readInt();
		v.pb(pi(l, 0));
		v.pb(pi(l+t,1));
		v.pb(pi(r+1, 2));
		v.pb(pi(l-X,3)); v.pb(pi(r-X,3));
		v.pb(pi(l-1,3)); v.pb(pi(r-1,3));
		v.pb(pi(l+X-1,3)); v.pb(pi(r+X-1,3));
		v.pb(pi(r,3));
		vect.pb(l); vect.pb(r); vect.pb(l-X+1); vect.pb(r-X+1);
	}
	sort(all(v));
	int ppl_num = 0, charge_num = 0, cur_ss = 0;
	unordered_map <int,int> ss;
	FOR(i,0,v.size()-1){
		int pos = v[i].f;
		while (i < (int)v.size() && v[i].f == pos){
			if (v[i].s == 0) ppl_num++;
			else if (v[i].s == 1) charge_num++;
			else if (v[i].s == 2){
				ppl_num--; charge_num--;
			}
			i++;
		}
		i--;
		if (ppl_num >= K){
			ss[pos] = cur_ss + charge_num;
			cur_ss += charge_num * (v[i+1].f - v[i].f);
		}else ss[pos] = cur_ss;
	}
	int ans = 0;
	aFOR(i,vect){
		ans = max(ans, ss[i+X-1] - ss[i-1]);
	}
	cout << ans;
	
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50